Engine or like governor.



J. TAYLOR & D. H. EVANS. ENGINE 0R LIKE GOVERNOR.

APPLICATION FILED 313.26, 1912.

1,029,479, Patented June 11,1912.

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J. TAYLOR & D. H. EVANS.

ENGINE OR LIKE GOVERNOR.

APPLICATION FILED PEB.26,1912.

1,029,479. 7 Patented June 11, 1912.

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ENTT ETTS FE T OFTCE.

JOHN TAYLOR AND DAVID HENRY EVANS, 0F LIVERPOOL, ENGLAND.

ENGINE OR LIKE GOVERNOR.

Application filed February 26, 1912.

To all whom it may concern:

Be it known that we, J ornv TAYLOR and abnormally increasing their speed, owing to the resistance of work being more or less.

suddenly relieved, such as happens with modern engines, due, in the case of ships, to the lifting of the propellers more or less out of the water, or to the variation of depth of immersion of it, or to breakdowns, such as the breaking of the propeller or crank shaft. And the species of governor to which the invention belongs is that in which a weight or mass is mounted upon, and moved up and down by a reciprocating lever or the like of the engine or machinery, or an arm lever, or the like worked by it, and in which the movement of this weight, through suitable mechanism, controls or actuates the throttle or other governing valve past which the steam or motor fluid flows to the driving engine; and this weight also has connected with it a small weight or weighted device for holding it-the main weightup, in the case of a very rapid or sudden increase of speed of the engine or machinery, due to a breakdown, or the like taking place; so that the steam or motor fluid which has been cut off from the engine, through the action of the main weight, is kept off until the small weight or device is removed by the attendant.

The chief object and effect of the present invention is to provide improvements in connection with governors of this kind by which the action of the smaller Weight or weighted device referred to, may be con trolled, and the conditions under which, or the rate of speed of the engines at which it would come into action, could be varied at will, and its functions or actions be performed with certainty and security.

The invention will be described with the aid of the accompanying drawings, in which Figure 1 is a face view of a governor of the type referred to: and Fig. 2 is a sec- Specification of Letters Patent.

Patented June 11, 1912.

Serial No. 679,522.

tion on the line 22 of Fig. 8. Fig. 3 is an enlarged face view of a portion of the governor. Fig. 4 is a diagram showing the application of the governor.

Our invention relates to improvements in the construction shown and described in U. S. patent to Aspinall, No. 516,041 and Hepburn, et al., No. 669,694, and is directed mainly to the particular means employed for holding the throttle valve in closed position in case of a breakdown or for any other reason unusual speed occurs.

In the accompanying drawing, the features of the governor to which the improvement is applied are shown conventionally, as the construction and operation are the same as fully set forth in the patent to Aspinall.

l indicates a weight mounted to rock on a pin 2, and provided at one end with a latch lug 7. A cross arm l is mounted on the under side of the weight 1, and is held in its normal position by a spring 1 the opposite ends of the cross arms being bifur cated to engage pins 3. The pins 3 extend from pawls 3, pivoted at a, so that when the weight is rocked the pawls 8 will likewise be rocked on their pivots. A dog 5 is pivoted on the frame and its end 5 is in the path of movement of one end of the latch lug 7 and is designed to engage therewith. The dog 5 is normally drawn toward the latch lug-7 by a spring 6 and extending from the dog is a finger 6. All these features are the same and operate in the same manner as in the patents above mentioned.

One end 12 of the latch lug 7 is cut away to form a locking seat for a supplemental weight 10, means for holding said weight in position forming the essential feature of the present invention. The weight 10 is pivoted at 17 to a lug 11, and it has a beveled edge 11 which cooperates with the cut-away portion 12 of the latch lug 7. Adjacent the beveled edge 11 is a pin 16. EX- tending from the bracket 11 is a housing 11 in which operates a pin 13 normally held in the path of movement of the pin 16 by a spring 15. A nut 18 is threaded in the open end of the barrel 11*, and bears against the spring 15 and affords a convenient means for regulating the tension of the spring.

In operation, when the lever 20 to which the governor is shown attached and which corresponds with the lever 12 in the patent to Aspinall is operated under abnormal conditions, the weight 1, will be in the position shown in Fig. 1 and as indicated in dotted lines in Fig. 2. Now when the rate of speed of the engine is increased above that desired, and about the time of the completion of the up stroke of the lever 20, the weight 1 will by momentum rock on the pivot 2, and the dog 5 will engage with the end of the latch lug 7. The movement of the weight also rocks the cross arm 1 which will withdraw the upper pawl 3 and project the lower pawl 3 turning the down stroke-- and the next up stroke of lever 20, the weight 1 will be held in this position. To-

ward the end of the down stroke, the lever,

3/, will engage with the lower pawl 3 and press it inwardly against the tension of the spring 1 which is provided for this purpose. VVhen the lower pawl 3 passes the lever 3 the spring 1 immediately projects said pawl. Now, upon the next up stroke of the governor, the lower pawl 3 will engage lever y, and will lift it and operate the throttle valve and thereby cut off the steam. When lever 20, again lowers, the finger 6 will strike the lever y and release the dog 5 from the latch lug 7 and the upper pawl 3 will be projected while lower pawl 3 will be withdrawn. The upper pawl 3 will then in the next down stroke of lever 20, if the increase of rate of speed has been reduced to normal rate engage with the lever y, and operate it and thereby open the throttle valve and admit steam to the engine. Of course, when the upper pawl 3 is out and it passes the lever y, the latter acting on the pawl forces it in against the tension of spring 1.

If a Very abnormal rate of speed should occur, the weight 10 will be thrown from the normal position'indicated in dotted lines in Fig. 2 to the position shown in full lines in the same figure. That is the beveled edge 11 catches under the beveled end 12 of the latch lug 7, and absolutely locks the weight against further movement and holds the throttle valve in closed position.

The pin 16 is normally positioned behind the spring pressed pin 13, as shown in dotted lines in Fig. 2, hence it requires a much greater sudden movement of lever 20 to throw the weight 10 into operative position, than would be necessary to shift the weight 1. When the weight 10 is rocked, the end of pin 16 overcomes the pressure of the spring 15 on the pin 13, thus permitting said weight to swing. .But the pressure of the spring is at all times regulated so that an ordinarily abnormal increase in the speed will hold the weight in inoperative position.

Once the weight 10 is thrown in operative position as indicated in Fig. 2, it cannot be set except by the operator disengaging it from the latch lug 7. When resetting the parts, the operator disengages the weight 10, from the latch lug 7 and throws it up until it strikes the pin 13, then upon movement of the weight 1, the latch 7, will strike weight 10, with a blow and retract pin 13, and thus reset the friction holding means.

hat we claim is:

1. In a governor, the combination of a vibrating lever, a tilting weight mounted on the vibrating lever and adapted to be operated when the vibrating lever is moved abnormally, a pivoted weight adapted to cooperate with the tilting weight to prevent operation of the latter when sudden or ex cessive movement of the vibrating lever occurs, and friction means for holding the aivoted wei 'ht in normal osition com rising a yielding contact and a stop with which the yielding contact engages.

2. In a governor, the combination of a vibrating lever, a tilting weight mounted on the vibrating lever and adapted to be operated when the vibrating lever is moved abnormally, a pivoted weight adapted to cooperate with the tilting weight to prevent operation of the latter when sudden or excessive movement of the vibrating lever occurs, a pin extending from the pivoted weight, a spring pressed pin cooperating with the pin on the weight, and means for regulating the pressure on the spring pressed pin.

3. In a governor, the combination of a vibrating lever, a tilting weight mounted on the vibrating lever and adapted to be operated when the vibrating lever is moved abnormally, a pivoted weight adapted to cooperate with the tilting weight to prevent operation of the latter when sudden or excessive movement of the vibrating lever occurs, and friction means for holding the pivoted weight in normal position, compris- In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

JOHN TAYLOR. DAVID HENRY EVANS.

Witnesses:

SoMnRvILLr. GooDALL, JosnrH IV. HUNTER.

Copies of this patent may be obtained for five cents each, y addressing the Commissioner of Patents,

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